Home > VansAirForceForums

-Advertise in here!
- Today's Posts | Insert Pics

Keep VAF Going
Donate methods

Point your
camera app here
to donate fast.

VAF on Twitter:

Go Back   VAF Forums > Model Specific > Rocket
Register FAQ Members List Calendar Search Today's Posts Mark Forums Read

Thread Tools Search this Thread Display Modes
Prev Previous Post   Next Post Next
Old 09-24-2022, 11:05 AM
Freemasm Freemasm is offline
Join Date: Nov 2017
Location: Orlando
Posts: 959
Default Water dissolvable mold core material

Novel approach or doomed to failure? The scoop to air box I/F is less than aerodynamically smooth. I’ve got one of the older legacy designs. Didn’t want to fill with that much dry micro. Trying to fill with foam wasn’t going well. After looking for a dissolvable mold core material, I experimented with cheap-a$$ drywall joint compound.

Known bad = Yes it shrinks. Yes it takes time to dry thick fills. Yes it cracks.

Potential good =. It’s cheap. Available most anywhere. Cleans/dissolves with water. Sand-able or smooths with water and sponge, finger, etc.

I filled a 1” pipe and let it dry. It “hydroblasted” out with a siphon gun and water. An occasional gouged hole speeds things up as you’d imagine. Have the deep parts rough filled and will soon smooth and glass it in. Hopefully it works or it may be a complete waste of time. I’ll pass along. Hopefully another cheap method for dealing with similar issues in the future.
Attached Thumbnails
Click image for larger version

Name:	7F0CDAF5-1BD5-4127-B7D0-E8FCB40E6560.jpg
Views:	169
Size:	254.1 KB
ID:	31428  Click image for larger version

Name:	2C183104-D820-4C77-A763-A04A1B305583.jpg
Views:	155
Size:	291.5 KB
ID:	31429  
Reply With Quote

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

All times are GMT -6. The time now is 09:15 PM.

The VAFForums come to you courtesy Delta Romeo, LLC. By viewing and participating in them you agree to build your plane using standardized methods and practices and to fly it safely and in accordance with the laws governing the country you are located in.